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Accumulated Other Comprehensive Income
 6 Months Ended
Jun. 30, 2017
Accumulated Other Comprehensive Income [Abstract]  
Accumulated Other Comprehensive Income
(11) Accumulated Other Comprehensive Income:
The following table illustrates changes in accumulated other comprehensive income by component for the six months ended June 30, 2017:

     
Unrealized
    
     
holding gains on
    
  
Foreign
  
available-for-sale
    
  
Currency
  
securities
  
Total
 
          
Beginning balance
 
$
(831
)
 
$
34,051
  
$
33,220
 
             
   Other comprehensive income
            
      before reclassifications
  
453
   
11,137
   
11,590
 
             
   Amounts reclassified from
            
      accumulated other
            
      comprehensive income
  
-
   
(2,322
)
  
(2,322
)
             
Net current-period other
            
   comprehensive income
  
453
   
8,815
   
9,268
 
             
Ending balance
 
$
(378
)
 
$
42,866
  
$
42,488